GSI, INC.

MODEL 21

  Data bus:                  16-bit, ISA

  Size:                      Half-length, half-height card

  Hard drive supported:      Two IDE (AT) Interface drives

  Floppy drives supported:   Four 360KB, 720KB, 1.2MB, 1.44MB, or 2.88MB
                             drives

[Image]

                                CONNECTIONS

                    Function                              Location

  34-pin control cable connector -                           J2
  regular/2.88MB floppy drive

  34-pin control cable connector - regular                   J3
  floppy drive

  5-pin connector - DC power                                 J5

  40-pin IDE(AT) Interface connector                         J6

  4-pin connector - Drive active LED                         J8

                               BIOS ADDRESS

  Settings for Model 21 with
    Part # 1533-21-04-3 or
           earlier

              Address              J4/jumper 1            J4/jumper 2

            C800-C9FFh          pins 1 & 2 closed      pins 1 & 2 closed

  »         D800-D9FFh          pins 2 & 3 closed      pins 1 & 2 closed

            DC00-DDFFh          pins 2 & 3 closed      pins 2 & 3 closed

            E000-E1FFh          pins 1 & 2 closed      pins 2 & 3 closed

  Note: On Model 21 with Part # 1533-21-03-6 or earlier address
  D000-D1FFh is selected instead of E000-E1FFh.

                               BIOS ADDRESS

  Settings for Model 21 with
    Part # 1533-21-06-8 or
            later

             Address               J4/jumper 3            J4/jumper 4

            C800-C9FFh          pins 1 & 2 closed      pins 1 & 2 closed

  »         D000-D1FFh          pins 1 & 2 closed      pins 2 & 3 closed

            D800-D9FFh          pins 2 & 3 closed      pins 1 & 2 closed

            E000-E1FFh          pins 2 & 3 closed      pins 2 & 3 closed

  Note: On Model 21 with Part # 1533-21-05-0 address E400-E5FFh is
  selected instead of E000-E1FFh.

                       MISCELLANEOUS TECHNICAL NOTES

    On Model 21 with Part # 1533-21-06-8 or later J4/jumper 2 is factory
              configured to pins 2 & 3 closed - do not alter.

  J4/jumper 1 is not used on Model 21 with Part # 1533-21-06-8 or later.

      J4/jumper 3 and J4/jumper 4 are not used on Model 21 with Part #
                         1533-21-04-3 or earlier.